Cruces system
The Cruces system was a star system which was located somewhere in the Alpha or Beta Quadrant.
A Tarkanian diplomat who was transported aboard the USS Enterprise-D in 2367 left the ship for the Cruces system, where he disappeared under mysterious circumstances. (TNG: "The Drumhead")
This system was only mentioned in dialogue.
In the script for "The Drumhead", Cruces was listed in the pronunciation guide, where the term was pronounced as "CREW-ses".